New installation of V8.0.4 fails

I have tried to do a clean install of V8.0.4 but it fails when I try to log in admin/admin. The log reveals the following:

2019-06-12 13:35:20.464

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DEBUG

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login for maintenance with other than 'admin' / 'admin'
2019-06-12 13:35:20.466 ***** ERROR ***** [] Exception-[22021] SQLSTATE[22021]: Character not in repertoire: 7 ERROR: invalid byte sequence for encoding "UTF8": 0xba

Do you have any pointers as to what is causing the issue?

Yes. I think either the issue is that it isn't interpreting it as UTF8 for some reason, or else the database has no admin/admin user in it.

I have tried a completely new installation with 7.2.5 as I noticed from the forum you said it should work with a completely empty database. The issue is the same. The complete log file is attached.

It appears to be saying that the table resource is not defined.

I have created another V8.0.4 with new database name, new install, and it again fails. I inserted a line in the loginCheck.php to log the username and password being used. The results are nothing like the admin/admin being entered, and are different every time I try to login. It seems to me they are being encrypted by some mechanism. Two such excerpts from the log are below:

2019-06-12 16:31:50.168 ..... SCRIPT .... 192.168.0.254 Page=loginCheck.php
2019-06-12 16:31:50.169 ..... SCRIPT .... 192.168.0.254 ->/tool/loginCheck.php
2019-06-12 16:31:50.173

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DEBUG

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loginCheck : current db version = ''
2019-06-12 16:31:50.173

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DEBUG

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username:'L▒맨' / password:'hgE95ucaAV1SnHGQcQ=='


2019-06-12 16:31:51.408 ..... SCRIPT .... 192.168.0.254 Page=loginCheck.php
2019-06-12 16:31:51.409 ..... SCRIPT .... 192.168.0.254 ->/tool/loginCheck.php
2019-06-12 16:31:51.413

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DEBUG

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loginCheck : current db version = ''
2019-06-12 16:31:51.413

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DEBUG

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username:'▒]▒ ▒' / password:'dQLTHOgaAV1oFRsfEQ=='