Error Messages in GFX files

[TMaekler]

I am getting three error messages from graphic files from the mod "More Precursors". Are these real errors in those files or is IMM giving me wrong warnings?
https://steamcommunity.com/sharedfiles/filedetails/?id=2951652477

Error at line: 1 column: 5 file: gfx\interface\icons\relics\r_ezentian_colossus_core.pdn.
Please report this error to the author of the mod: More Precursors.

Error message says:
Error in gfx\interface\icons\relics\r_ezentian_colossus_core.pdn: Ln: 1 Col: 5
PDN3c <pdnImage width="150" height="150" layers="4" savedWithVersion="5.2.8451
     ^
Expecting: end of input, statement or whitespace

Same with

Error at line: 1 column: 6 file: gfx\interface\icons\relics\r_ezentian_colossus_core_new_new.pdn.
Please report this error to the author of the mod: More Precursors.

Error at line: 1 column: 5 file: gfx\interface\icons\relics\r_ezentian_colossus_core.pdn.
Please report this error to the author of the mod: More Precursors.

[bcssov]

Game most certainly won't load these files but will try to load them. Therefore for the same reason Irony also validates any files found in the valid game folders. PDN files are source graphic files for paint.net.