can't access my lan's webserver after reconfiguring the lan

I recently changed isp and got a cable modem which works fine for most things but I put it on bridge mode to add the modem router I was using with my previous isp as it has more features I like to use, and after configuring it as router only, I can't access my lan's web server anymore... my knowledge is limited, as configuring both modems was difficult for me, now I don't know whats wrong as everything is fine but not the web sever, which is working, as I can access it locally. Does anybody knows whats wrong?

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