Are you using any proxies or fingerprints? Have you tried
reloading the page or using different proxy/fingerprint?
Have you tried loading in regular browsers - chrome/ffox etc?
Can you send test script that reproduces that error or just
post exact web link/address?
If your cookies in same format as BAS, you just read it from file to variable and go Network-load cookies-set cookies for browser. If format of your cookies not compatible with BAS, compare and convert all your cookies in right format