In support of this comment on Proton's CoH2 issues thread: Company of Heroes 2 (231430) #3875
Based on original solution by @Cytomax55 in the same thread.
Edit Feb 2023: this may also work for CoH3 (the paths are different of course). I haven't tested this for CoH 3 yet and hope either Proton / Relic will make this fix unnecessary. See also @sfxworks's comment.
Instructions for automatic fix with a script by TechT10n