Solve the problem of websaist integration my warehouse and crm

actually everything worked, in my warehouse created a card, added to the site, in the crm everything came, at some time ceased to work integration my warehouse, the employee began to update everything in the administrator of the webmaster, updated that everything stopped working, you need to find the problem and restore everything. The webmaster on the server is standing
We need to see the problem, the price is being discussed