You may be able to toss a teleporter pyramid through the door and teleport in.
Please email supportdos@larian.com, with a description of the problem and the report.zip file generated by the
D:OS support tool (for the PC version). The report will contain system and game information, any crash dumps, and your saved games. If file size is an issue, any saves not related to the problem can be deleted (a save or two where this occurs would be sufficient).
It is a known issue, but additional information may help Larian isolate and fix the problem.