I tested installing Laravel through Plesk on Tommy and it worked just fine for me. You must have corrupted your account somehow. I created a full backup which you can download if you need it from https://heliohost.org/backup/ You have 4 options:
Reset your account to the default settings, which includes deleting all of your data, but this would fix Laravel.
Install Laravel manually without Plesk's help.
Switch to a VPS and use the Docker deployment of Laravel. https://heliohost.org/vps/
Use something other than Laravel on your existing, albeit broken, account.
I recommend option 1, since it's likely that Laravel isn't the only thing broken on your account, but that requires a lot of effort from you to restore all of your websites from backups.