Just to confirm, you're using Chrome or Edge? It sound like Chrome.
I'd would approach this by disabling all extensions, not just ad block. Another one of them could cause the block. Click the three dots near the top right corner of the Chrome window, select More tools > Extensions. Disable each extension, one by one, restarting Chrome between each one. This will temporarily isolate the extension which causes the error.
Just to confirm, you're using Chrome or Edge? It sound like Chrome.
I'd would approach this by disabling all extensions, not just ad block. Another one of them could cause the block. Click the three dots near the top right corner of the Chrome window, select More tools > Extensions. Disable each extension, one by one, restarting Chrome between each one. This will temporarily isolate the extension which causes the error.