Hi,
Due to the recent CrossRef API upgrade, we started to experience DOI submission problems in our OJS version, thus, we decided to upgrade our OJS 3.1.1.4 version to the latest OJS 3.3.0.7.
But during the upgrade process, we observe the following error.
We have the following configurations :
; Client output/input character set
client_charset = utf-8
; Database connection character set
connection_charset = utf8
; database driver
driver = mysqli
The current database collation is utf_general_ci
Is there any idea about the reason for this upgrade error?
Regards.
Zaratushtra