I'm experiencing a strange problem with the backend UI.
Some extensions (Extension Builder and Luxletter) are not building the links correctly. As a result I can't change pages in the backend of the respective extension.
Example: Luxletter will load when clicked on the side nav (loads the dashboard) but will not change to newsletter page.
Expected link: https://webserver.rado/typo3/index.php?route=%2Fmodule%2Flux%2FLuxletterLuxletter&token=16e398a5467b3415e5c24cfff2de5df8595e74ef&tx_luxletter_lux_luxletterluxletter%5Baction%5D=list&tx_luxletter_lux_luxletterluxletter%5Bcontroller%5D=Newsletter
Actual link: http://webserver.rado/typo3/index.php?route=%2Fmodule%2Flux%2FLuxletterLuxletter&token=84b471f164850080501feb0eb6b854d058d1c6fb&tx__%5Baction%5D=list&tx__%5Bcontroller%5D=Newsletter
BE Modules Variables seem to have the correct values. No problem detected from TYPO3 logs.
TYPO3 10.4.37, luxletter 17.8.0, Extension Builder 10.0.5
I tried different versions of the extensions. No luck.