6.3 upgrade. Can't login and use tools

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I have also filed this as a bug report.

Here is a sample of what the logs look like when connection to browsers fail…

{"thread":"main","reason":{},"p":{},"eventId":"dc6915335bf7487f96e78b82793fe869","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:41:48.989Z"}
{"thread":"main","reason":{},"p":{},"eventId":"be8a5ff8bcbc45bfb46f1b8a515ba418","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:41:50.541Z"}
{"thread":"main","reason":{},"p":{},"eventId":"5129c058241b45cf9f0207264bca9cf6","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:25.601Z"}
{"thread":"main","reason":{},"p":{},"eventId":"e6fbfaafab4e4f7c8e380d7ae5a45a70","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:26.102Z"}
{"thread":"main","reason":{},"p":{},"eventId":"3cffe3659db444d79f00a0eebc6e217f","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:26.774Z"}
{"thread":"main","reason":{},"p":{},"eventId":"5b2c932544ed4e668a2b48ec5b137c57","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:27.083Z"}
{"thread":"main","reason":{},"p":{},"eventId":"1d8fb0e74ec74417877534ee0abe84d7","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:27.350Z"}
{"thread":"main","reason":{},"p":{},"eventId":"361933d20ec141f888663ba484c50fd1","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:27.934Z"}
{"thread":"main","reason":{},"p":{},"eventId":"208120c97a844fa7990b88d5b3d20d23","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:42:57.875Z"}
{"thread":"main","reason":{},"p":{},"eventId":"3bcbc862aa7b43198cf69706a64a7d68","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:43:32.483Z"}
{"thread":"main","reason":{},"p":{},"eventId":"194a1eee002b454aa7870b27b656cf9b","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:43:49.422Z"}
{"thread":"main","reason":{},"p":{},"eventId":"fdc6e93e4a9d4b1593da63ee5bb8a42e","level":"warn","message":"Unhandled Rejection.","timestamp":"2022-02-23T16:43:56.757Z"}