Having used Chrome for years, it suddenly started failing to open. It gets as far as the opening screen with the Restore? box showing. Whatever I do after a few seconds it shuts down. No error message. I have removed and reinstalled a couple of times without success.

So I ran it in Terminal and get this:

[15881:15925:0521/085530.794880:ERROR:login_database.cc(641)] Password store database is too new, kCurrentVersionNumber=28, GetCompatibleVersionNumber=29

[15881:15925:0521/085530.795041:ERROR:password_store_default.cc(39)] Could not create/open login database.

[15916:15916:0521/085530.907906:ERROR:sandbox_linux.cc(374)] InitializeSandbox() called with multiple threads in process gpu-process.

[15881:15909:0521/085531.061833:ERROR:login_database.cc(641)] Password store database is too new, kCurrentVersionNumber=28, GetCompatibleVersionNumber=29

[15881:15909:0521/085531.061921:ERROR:password_store_default.cc(39)] Could not create/open login database.

--2021-05-21 08:55:31--  https://clients2.google.com/cr/report

Resolving clients2.google.com (clients2.google.com)... 142.250.187.206, 2a00:1450:4009:81f::200e

Connecting to clients2.google.com (clients2.google.com)|142.250.187.206|:443... connected.

HTTP request sent, awaiting response... 200 OK

Length: unspecified [text/plain]

Saving to: ‘/dev/fd/4’



Crash dump id: 392a58148f3f9f5d



     0K                                     --2021-05-21 08:55:32--  https://clients2.google.com/cr/report

Resolving clients2.google.com (clients2.google.com)... 142.250.187.206, 2a00:1450:4009:81f::200e

Connecting to clients2.google.com (clients2.google.com)|142.250.187.206|:443... connected.

HTTP request sent, awaiting response... 200 OK

Length: unspecified [text/plain]

Saving to: ‘/dev/fd/4’



     0K

 Crash dump id:  aa4059a5adb3a524 

                                            Illegal instruction (core dumped)

I can't understand what has changed since yesterday. I did install Guayadeque, but can't see how that would affect it.