Problem with Altium

[jodazuvi]

hello I was finishing to improve PCB design, the next day I opened Altium designer appeared this message (p1)
and then design the PBC does not appear,(P2)
how can I fix that?

[robertferanec]

It looks like something weird with your Altium. Maybe try to open a different Altium file (older or different project)? If the problem persists, I would re-install Altium. Please let me know how you fixed it.

[jodazuvi]

I tryed uninstalling Atium but the problem continued, after that I opened a pcb desing fron the historial, previous to the last saved, and it works good