Cannot install mySQL, PHP, Python on ReadyNAS 212 ver. 6.10.8

Hi, i have very same problem with installing mySQL. PHP install went ok. Altough i have to downgrade from 6.10.10 to 6.10.9 cause apps were otherwise unavailable to get.

I have tried both ways, installing app from the apps screen and also downloading .deb file mysqlr6_1.0.1_all.deb

and trying to install it directly with -y and with --allow-unauthenticated both there are error messages regarding server with repo or packages probably does not exist anymore. could you help me or tell how to solve this problem?

Tried via SSH, this is what it reports: package author is super_poussin maybe he could help?

root@NAS:/data/pictures# apt install /data/pictures/mysqlr6_1.0.1_all.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'mysqlr6' instead of '/data/pictures/mysqlr6_1.0.1_all.deb'
The following additional packages will be installed:
  libaio1 libdbd-mysql-perl libdbi-perl libmysqlclient18 libterm-readkey-perl
  mysql-client mysql-client-5.5 mysql-common mysql-server mysql-server-5.5
  mysql-server-core-5.5
Suggested packages:
  libclone-perl libmldbm-perl libnet-daemon-perl libsql-statement-perl mailx
  tinyca
Recommended packages:
  libhtml-template-perl
The following NEW packages will be installed:
  libaio1 libdbd-mysql-perl libdbi-perl libmysqlclient18 libterm-readkey-perl
  mysql-client mysql-client-5.5 mysql-common mysql-server mysql-server-5.5
  mysql-server-core-5.5 mysqlr6
0 upgraded, 12 newly installed, 0 to remove and 52 not upgraded.
Need to get 9,086 kB/9,130 kB of archives.
After this operation, 96.6 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err:1 http://security.debian.org jessie/updates/main amd64 mysql-common all 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:2 http://security.debian.org jessie/updates/main amd64 libmysqlclient18 amd64 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:3 http://security.debian.org jessie/updates/main amd64 mysql-client-5.5 amd64 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:4 http://security.debian.org jessie/updates/main amd64 mysql-server-core-5.5 amd64 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:5 http://security.debian.org jessie/updates/main amd64 mysql-server-5.5 amd64 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:6 http://security.debian.org jessie/updates/main amd64 mysql-client all 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:7 http://security.debian.org jessie/updates/main amd64 mysql-server all 5.5.62-0+deb8u1
  404  Not Found [IP: 146.75.118.132 80]
Err:8 http://mirrors.edge.kernel.org/debian jessie/main amd64 libaio1 amd64 0.3.110-1
  404  Not Found [IP: 147.75.80.249 80]
Err:9 http://mirrors.edge.kernel.org/debian jessie/main amd64 libdbi-perl amd64 1.631-3+b1
  404  Not Found [IP: 147.75.80.249 80]
Err:10 http://security.debian.org jessie/updates/main amd64 libdbd-mysql-perl amd64 4.028-2+deb8u2
  404  Not Found [IP: 147.75.80.249 80]
Err:11 http://mirrors.edge.kernel.org/debian jessie/main amd64 libterm-readkey-perl amd64 2.32-1+b1
  404  Not Found [IP: 147.75.80.249 80]
Err:10 http://security.debian.org jessie/updates/main amd64 libdbd-mysql-perl amd64 4.028-2+deb8u2
  404  Not Found [IP: 147.75.80.249 80]
E: Failed to fetch http://mirrors.edge.kernel.org/debian/pool/main/liba/libaio/libaio1_0.3.110-1_amd64.deb  404  Not Found [IP: 147.75.80.249 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/mysql-common_5.5.62-0+deb8u1_all.deb  404  Not Found [IP: 146.75.118.132 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/libmysqlclient18_5.5.62-0+deb8u1_amd64.deb  404  Not Found [IP: 146.75.118.132 80]

E: Failed to fetch http://mirrors.edge.kernel.org/debian/pool/main/libd/libdbi-perl/libdbi-perl_1.631-3+b1_amd64.deb  404  Not Found [IP: 147.75.80.249 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/libd/libdbd-mysql-perl/libdbd-mysql-perl_4.028-2+deb8u2_amd64.deb  404  Not Found [IP: 147.75.80.249 80]

E: Failed to fetch http://mirrors.edge.kernel.org/debian/pool/main/libt/libterm-readkey-perl/libterm-readkey-perl_2.32-1+b1_amd64.deb  404  Not Found [IP: 147.75.80.249 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/mysql-client-5.5_5.5.62-0+deb8u1_amd64.deb  404  Not Found [IP: 146.75.118.132 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/mysql-server-core-5.5_5.5.62-0+deb8u1_amd64.deb  404  Not Found [IP: 146.75.118.132 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/mysql-server-5.5_5.5.62-0+deb8u1_amd64.deb  404  Not Found [IP: 146.75.118.132 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/mysql-client_5.5.62-0+deb8u1_all.deb  404  Not Found [IP: 146.75.118.132 80]

E: Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-5.5/mysql-server_5.5.62-0+deb8u1_all.deb  404  Not Found [IP: 146.75.118.132 80]

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
root@NAS:/data/pictures#