Assetto corsa modded car problems

Hi all
i recently had a error with the FR 3.5 from Virtua simolatzione
I managed to find the error code but the guys from VS can`t help me either


ERROR: KN5IO trying to load version 6 on a KN5 v5 system
Loading 0 textures
Loading 54 materials
ERROR: Shader indscreen.dds NOT FOUND, RETURNING NULL
ERROR: Shader indscreen.dds not found

do any of you guys know how to fix this? (i would love to drive the FR but i can`t )
Thanks