Platesolve failing randomly, error related to opening APM

Hi,
I have been using SGP for over a year without any issues, and I am reporting this because the behavior got weird 2 days ago suddenly, and it is an error a friend is suffering from as well. Platesolve works well and I never had an issue with it since setting it up. Now it fails at random moments, below are some scenarios:

  • failed after recovery initiated
  • failed while starting a target
  • failed on a 2nd or 3nd iteration (not because it reached the limit)

In most cases, it is practically pointed very near to the target, it solves the first time with an error above the threshold, the next time it opens platesolve 2 and never finds the target again, it keeps searching till it times out. In the logs, the below error pops up in all scenarios:
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] MSG: PlateSolve: APM file found, but could not not be opened.
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] ******************************************
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] Auto center validation frame failed to solve. PlateSolve: APM file found, but could not not be opened.
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] Adding sequence level notification: Auto center validation frame failed to solve. PlateSolve: APM file found, but could not not be opened.
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] Sending Notification: Error - Auto center validation frame failed to solve. PlateSolve: APM file found, but could not not be opened.
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] Auto center validation frame solve failed. PlateSolve: APM file found, but could not not be opened.
[07-31-19 03:50:12.273][DEBUG] [Telescope Thread] Adding sequence level notification: Auto center validation frame solve failed. PlateSolve: APM file found, but could not not be opened.
[07-31-19 03:50:12.274][DEBUG] [Telescope Thread] Sending Notification: Error - Auto center validation frame solve failed. PlateSolve: APM file found, but could not not be opened.

Again, this is newly happening, without any changes and even right after a successful platesolve iteration, where the next fails. I am wondering if a Windows 10 update made some changes in allowing access to APM files or something. I have seen the error in other posts, but I couldn’t find a solution. Blind solve is not enabled.

If I am awake when this happens, I usually center on another random target, then platesolve works, then I go back to my intended target and it works as well.