It depends on the precise mistake messages you can get, but from time to time it can help to set a higher browser emulation during the registry. You can find more info on that e.g. at Daniel Pineault's web site. When you are new to WordPress, here is a stage-by-phase https://ecommerce-web-development85837.dreamyblogs.com/37101862/5-simple-techniques-for-white-label-wordpress-maintenance