FA stopped working

I don't really know which part of the forum I should send it... so I chose here.

I use FA for years now, beside the fiscal years change (with it I always had problems) I did not encounter bigger problems.

The problem which I have now is that it refuses to act when certain actions are clicked.
For example if I want a report of profit and loss. Or when I want to enter another journal entry.
Whatever were normal actions. Now they refuse to work.

Only what I see is the that it works for a while and finally displays a yellow triangle at the top of the page.

What to do?