I guess you get this message only for the bercon maps plugin and other plugins load fine ?
Looking at the message - Max tries to load file called “._BerconMaps_2017_64.dlt” - did you rename it that way (with dot and underscore) ? Could you try renaming it to the original name without the dot and underscore (although it worked on my machine with exactly the same path and filename) ?
Ok solve the problem… stupid.
I did show hidden files and went to my morePlugins folder and there it was… the fucking .bercon_blah which was not a valid win32 blah…