See the topic here - Package Manager error preventing me from downloading endeavouros
You need to uncheck the packages ipw2100-fw and ipw2200-fw in the installer.
EDIT: Also, welcome to the forum 
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See the topic here - Package Manager error preventing me from downloading endeavouros
You need to uncheck the packages ipw2100-fw and ipw2200-fw in the installer.
EDIT: Also, welcome to the forum