### Bug description
Trying to install Star Citizen, when Lutris try to install …DLLs it throw an error. `NoneType' object has no attribute 'lower'`.
I realize is similar to the #3787 and I was using 0.5.9.1, and I upgraded to 0.5.10, but it is not the same.
```bash
ERROR 2022-04-12 00:42:28,265 [jobs.target:36]:Error while completing task <bound method CommandsMixin.task of <interpreter.ScriptInterpreter object at 0x7f5ff2393880 (lutris+installer+interpreter+ScriptInterpreter at 0x2b6ed40)>>: <class 'AttributeError'> 'NoneType' object has no attribute 'lower'
File "/usr/lib64/python3.9/site-packages/lutris/util/jobs.py", line 34, in target
result = self.function(*args, **kwargs)
File "/usr/lib64/python3.9/site-packages/lutris/installer/commands.py", line 436, in task
command = task(**data)
File "/usr/lib64/python3.9/site-packages/lutris/runners/commands/wine.py", line 346, in winetricks
return wineexec(
File "/usr/lib64/python3.9/site-packages/lutris/runners/commands/wine.py", line 299, in wineexec
wine.prelaunch()
File "/usr/lib64/python3.9/site-packages/lutris/runners/wine.py", line 799, in prelaunch
self.setup_dlls(
File "/usr/lib64/python3.9/site-packages/lutris/runners/wine.py", line 776, in setup_dlls
if dll_manager.version.lower() != "manual":
ERROR 2022-04-12 00:42:28,266 [interpreter._iter_commands:302]:Last install command failed, show error
```
### How to Reproduce
Steps to reproduce the behavior:
1. Try to install Star Citizen
2. After clicking on Install the problem arise
### Expected behavior
Install the game.
### Log output
```shell
INFO 2022-04-12 00:54:54,131 [startup.init_lutris:173]:Starting Lutris 0.5.10
WARNING 2022-04-12 00:54:54,159 [libretro.get_libretro_cores:24]:No folder at /home/schenkel/.local/share/lutris/runners/retroarch/
DEBUG 2022-04-12 00:54:54,167 [xrandr._get_vidmodes:15]:Retrieving video modes from XrandR
INFO 2022-04-12 00:54:54,199 [startup.check_driver:65]:Running AMD Mesa driver 21.3.8 on AMD Radeon RX 6800 XT (SIENNA_CICHLID, DRM 3.44.0, 5.17.2, LLVM 13.0.1) (0x73bf)
INFO 2022-04-12 00:54:54,199 [startup.check_driver:77]:GPU: 1002:73BF 1043:04F2 (amdgpu drivers)
WARNING: radv is not a conformant Vulkan implementation, testing use only.
INFO 2022-04-12 00:54:54,278 [startup.update_runtime:213]:Startup complete
DEBUG 2022-04-12 00:54:54,430 [lutriswindow.update_store:437]:Showing 0 games
DEBUG 2022-04-12 00:54:56,837 [application.show_window:332]:Showing window AddGamesWindow{}
DEBUG 2022-04-12 00:55:01,559 [http.get:83]:GET https://lutris.net/api/games?search=star+citizen&with-installers=True
DEBUG 2022-04-12 00:55:02,957 [api.get_game_installers:160]:Fetching installer https://lutris.net/api/installers/star-citizen
DEBUG 2022-04-12 00:55:02,958 [http.get:83]:GET https://lutris.net/api/installers/star-citizen
DEBUG 2022-04-12 00:55:03,380 [application.show_window:332]:Showing window InstallerWindowstar-citizen
DEBUG 2022-04-12 00:55:03,381 [application.on_app_window_destroyed:350]:Removed window AddGamesWindow{}
DEBUG 2022-04-12 00:55:04,146 [xrandr._get_vidmodes:15]:Retrieving video modes from XrandR
DEBUG 2022-04-12 00:55:05,568 [interpreter.get_extras:159]:Checking if service provide extra files
DEBUG 2022-04-12 00:55:05,568 [installer.prepare_game_files:146]:No service to retrieve files from
DEBUG 2022-04-12 00:55:05,582 [interpreter.create_game_folder:181]:Creating destination path /home/schenkel/Games/star-citizen
DEBUG 2022-04-12 00:55:07,036 [downloader.start:65]:⬇ https://install.robertsspaceindustries.com/star-citizen/RSI-Setup-1.5.4.exe
DEBUG 2022-04-12 00:55:12,200 [downloader.download_cb:125]:Finished downloading https://install.robertsspaceindustries.com/star-citizen/RSI-Setup-1.5.4.exe
INFO 2022-04-12 00:55:12,547 [file_box.on_download_complete:252]:Download completed
DEBUG 2022-04-12 00:55:12,547 [files_box.on_file_available:93]:client is available
INFO 2022-04-12 00:55:12,547 [files_box.on_file_available:99]:All files available
INFO 2022-04-12 00:55:12,547 [installerwindow.on_files_available:463]:All files are available, continuing install
DEBUG 2022-04-12 00:55:12,549 [interpreter._iter_commands:317]:Installer command: {'task': {'arch': 'win64', 'name': 'create_prefix', 'prefix': '$GAMEDIR'}}
INFO 2022-04-12 00:55:12,551 [wine.create_prefix:96]:Creating a win64 prefix in /home/schenkel/Games/star-citizen
DEBUG 2022-04-12 00:55:12,552 [system.execute:56]:Executing /home/schenkel/.local/share/lutris/runners/wine/lutris-fshack-6.21-6-x86_64/bin/wineboot
DEBUG 2022-04-12 00:55:12,552 [system.execute:62]:WINEARCH=win64 WINEPREFIX=/home/schenkel/Games/star-citizen WINEDLLOVERRIDES=winemenubuilder= WINE_MONO_CACHE_DIR=/home/schenkel/.local/share/lutris/runners/wine/lutris-fshack-6.21-6-x86_64/mono WINE_GECKO_CACHE_DIR=/home/schenkel/.local/share/lutris/runners/wine/lutris-fshack-6.21-6-x86_64/gecko
INFO 2022-04-12 00:55:28,120 [wine.create_prefix:147]:win64 Prefix created in /home/schenkel/Games/star-citizen
DEBUG 2022-04-12 00:55:28,167 [interpreter._iter_commands:317]:Installer command: {'task': {'app': '--force arial vcrun2019 win10', 'arch': 'win64', 'name': 'winetricks', 'prefix': '$GAMEDIR'}}
DEBUG 2022-04-12 00:55:28,196 [wine.use_lutris_runtime:115]:/home/schenkel/.local/share/lutris/runners/wine/lutris-fshack-6.21-6-x86_64/bin/wine is provided by Lutris, using runtime
ERROR 2022-04-12 00:55:28,627 [jobs.target:36]:Error while completing task <bound method CommandsMixin.task of <interpreter.ScriptInterpreter object at 0x7f3335f9e240 (lutris+installer+interpreter+ScriptInterpreter at 0x22d6e20)>>: <class 'AttributeError'> 'NoneType' object has no attribute 'lower'
File "/usr/lib64/python3.9/site-packages/lutris/util/jobs.py", line 34, in target
result = self.function(*args, **kwargs)
File "/usr/lib64/python3.9/site-packages/lutris/installer/commands.py", line 436, in task
command = task(**data)
File "/usr/lib64/python3.9/site-packages/lutris/runners/commands/wine.py", line 346, in winetricks
return wineexec(
File "/usr/lib64/python3.9/site-packages/lutris/runners/commands/wine.py", line 299, in wineexec
wine.prelaunch()
File "/usr/lib64/python3.9/site-packages/lutris/runners/wine.py", line 799, in prelaunch
self.setup_dlls(
File "/usr/lib64/python3.9/site-packages/lutris/runners/wine.py", line 776, in setup_dlls
if dll_manager.version.lower() != "manual":
ERROR 2022-04-12 00:55:28,628 [interpreter._iter_commands:302]:Last install command failed, show error
```
### System Information
```shell
[System]
OS: Slackware 15.0 current
Arch: x86_64
Kernel: 5.17.2
Desktop: KDE
Display Server: x11
[CPU]
Vendor: GenuineIntel
Model: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz
Physical cores: 6
Logical cores: 12
[Memory]
RAM: 31.3 GB
Swap: 16.0 GB
[Graphics]
Vendor: AMD
OpenGL Renderer: AMD Radeon RX 6800 XT (SIENNA_CICHLID, DRM 3.44.0, 5.17.2, LLVM 13.0.1)
OpenGL Version: 4.6 (Compatibility Profile) Mesa 21.3.8
OpenGL Core: 4.6 (Core Profile) Mesa 21.3.8
OpenGL ES: OpenGL ES 3.2 Mesa 21.3.8
Vulkan: Supported
```
### Media (optional)
_No response_
### Checklist:
- [X] I'm not asking for support with a game or the wine runner.
- [X] I have followed the above mentioned guides and have all the graphics and wine dependencies installed.
- [X] I have checked for existing issues that describe my problem prior to opening this one.
- [X] I understand that improperly formatted bug reports may be closed without explanation.