[Administrator Login loop on upgrade]

I forgot to mention in my original post that I'm running on Windows 2012 R2, IIS 8.5, PHP 7.1.11 & MySQL 5.6.19.

[Administrator Login loop on upgrade]

Hi All,

I'm attempting to upgrade from 4.2.1 to 5.0 or 5.0.2. I followed the upgrade instructions and passed all the requirements. When I get to step 2 (Administrator Login) I enter valid credentials and I'm immediately returned to the administrator login page with no error displayed. I've verified that I have the correct credentials by intentionally entering wrong credentials at which point I receive an error that my username or password are incorrect. I've tried this in Chrome, Firefox & Edge all with the same result. Below is my install.log. A debug.log was not created. Does anybody have any ideas how I can get around this issue or get more diagnostic info? In case it matters, the 4.2.1 install was a fresh install.

Starting file-check for plugins...
Finished file-check for plugins
=========================================================================
Attempting to detect an existing Openads (aka. phpAdsNew) installation...
PAN not detected
Attempting to detect an existing Openads (aka. Max Media Manager 0.1) installation...
MMM v0.1 not detected
Attempting to detect an existing Openads (aka. Max Media Manager 0.3) installation...
MMM v0.3 not detected
Attempting to detect an existing Revive Adserver installation...
schema file found: D:\Website\htdocs\ad.casinocity.com\htdocs/etc/changes/schema_tables_core_623.xml
schema definition from cache TRUE
successfully parsed the schema
schema name: openads
schema version: 623
schema status: final
running integrity check
comparing database testitsads with schema D:\Website\htdocs\ad.casinocity.com\htdocs/etc/changes/schema_tables_core_623.xml
table is not part of schema: banner_vast_element
table is not part of schema: data_bkt_a
table is not part of schema: data_bkt_a_var
table is not part of schema: data_bkt_c
table is not part of schema: data_bkt_m
table is not part of schema: data_bkt_r
table is not part of schema: data_bkt_vast_e
table is not part of schema: database_action
table is not part of schema: stats_vast
table is not part of schema: upgrade_action
to version: 623
timing: constructive
target database: testitsads
table prefix: rv_
successfully initialised DB Upgrade
verifying/creating constructive tasklist
Revive Adserver 4.2.1 detected
This version can be upgraded
Starting file-check for plugins...
Finished file-check for plugins
Starting file-check for plugins...
Finished file-check for plugins
Starting file-check for plugins...
Finished file-check for plugins
Starting file-check for plugins...
Finished file-check for plugins
=========================================================================
Attempting to detect an existing Openads (aka. phpAdsNew) installation...
PAN not detected
Attempting to detect an existing Openads (aka. Max Media Manager 0.1) installation...
MMM v0.1 not detected
Attempting to detect an existing Openads (aka. Max Media Manager 0.3) installation...
MMM v0.3 not detected
Attempting to detect an existing Revive Adserver installation...
schema file found: D:\Website\htdocs\ad.casinocity.com\htdocs/etc/changes/schema_tables_core_623.xml
schema definition from cache TRUE
successfully parsed the schema
schema name: openads
schema version: 623
schema status: final
running integrity check
comparing database testitsads with schema D:\Website\htdocs\ad.casinocity.com\htdocs/etc/changes/schema_tables_core_623.xml
table is not part of schema: banner_vast_element
table is not part of schema: data_bkt_a
table is not part of schema: data_bkt_a_var
table is not part of schema: data_bkt_c
table is not part of schema: data_bkt_m
table is not part of schema: data_bkt_r
table is not part of schema: data_bkt_vast_e
table is not part of schema: database_action
table is not part of schema: stats_vast
table is not part of schema: upgrade_action
to version: 623
timing: constructive
target database: testitsads
table prefix: rv_
successfully initialised DB Upgrade
verifying/creating constructive tasklist
Revive Adserver 4.2.1 detected
This version can be upgraded
Starting file-check for plugins...
Finished file-check for plugins
 

Sincerely, Alan