Site Admin Panel problem

Forbidden
You don't have permission to access /admin/index.php on this server.
Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.


It shows me this message when i try to edit store settings from site admin panel, it doesn’t even let me change static info and more things with this same error message, pictures down. More details in the pictures.

<a href="https://ibb.co/dJ4Ke6"><img src="https://preview.ibb.co/frfsz6/EE796753_ ... 5_DE20.jpg" alt="EE796753_CAFC_42_C9_B326_80_C84_C75_DE20" border="0"></a>
<a href="https://ibb.co/dHJ1sR"><img src="https://preview.ibb.co/jgNSXR/FED8_CAF0 ... C30_C8.jpg" alt="FED8_CAF0_AA7_B_4_F79_B18_A_ECF0_D5_BC30_C8" border="0"></a>
<a href="https://ibb.co/hBAQK6"><img src="https://preview.ibb.co/fWsuCR/3_D6_A2_D ... _C56_D.png" alt="3_D6_A2_DD6_4_C35_4400_BDD4_D9_B1_BF72_C56_D" border="0"></a>
<a href="https://ibb.co/m3RbRm"><img src="https://preview.ibb.co/g2V36m/E1_F645_C ... F39786.jpg" alt="E1_F645_CC_7316_438_C_BC86_B19335_F39786" border="0"></a>

SEO issues. Disable it and see if the problem persists afterwards. Also ensure to have configured your .htaccess , config.php and admin/config.php files correctly before using any SEO extensions.