Hi
I have this problem that I do not know how to solve
Check Files Integrity tells me that I have these problems

install/db/100-database.php is missing
install/db/101-database.php is missing
install/db/102-database.php is missing
.........
install/upgrade_2.7.0.php is missing
install/upgrade_2.8.0.php is missing
install.php is missing

can you do something for me please?

Piwigo 2.9.3
Operating system: Linux
PHP: 7.1.12 (Show info) [2018-03-03 11:52:46]
MySQL: 5.6.38-83.0-log [2018-03-03 11:52:46]
Graphics Library: ImageMagick 6.7.8-9
Piwigo URL: http://http://www.oldpainters.cloud/

Greetings,