Please fix PHP errors

The code is not good. The errors:

Deprecated: Non-static method FEP_Informations_Tab::section() should not be called statically in /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php on line 92  Call Stack: 0.0000 425728
1. {main}() /wordpress/wp-admin/network/index.php:0 0.0001 426112
2. require_once('/wordpress/wp-admin/network/admin.php') /wordpress/wp-admin/network/index.php:11 0.0001 426808
3. require_once('/wordpress/wp-admin/admin.php') /wordpress/wp-admin/network/admin.php:13 3.4739 34713008
4. do_action() /wordpress/wp-admin/admin.php:169 3.4739 34713384
5. WP_Hook->do_action() /wordpress/wp-includes/plugin.php:465 3.4739 34713384
6. WP_Hook->apply_filters() /wordpress/wp-includes/class-wp-hook.php:310 3.9381 36115816
7. FEP_Admin_Settings->admin_init() /wordpress/wp-includes/class-wp-hook.php:286 3.9385 36118072
8. FEP_Admin_Settings->fep_admin_settings() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:26

Notice: Undefined variable: html_fep_informations in /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings/tabs/informations.php on line 23 Call Stack: 0.0000 425728
1. {main}() /wordpress/wp-admin/network/index.php:0 0.0001 426112
2. require_once('/wordpress/wp-admin/network/admin.php') /wordpress/wp-admin/network/index.php:11 0.0001 426808
3. require_once('/wordpress/wp-admin/admin.php') /wordpress/wp-admin/network/admin.php:13 3.4739 34713008
4. do_action() /wordpress/wp-admin/admin.php:169 3.4739 34713384
5. WP_Hook->do_action() /wordpress/wp-includes/plugin.php:465 3.4739 34713384
6. WP_Hook->apply_filters() /wordpress/wp-includes/class-wp-hook.php:310 3.9381 36115816
7. FEP_Admin_Settings->admin_init() /wordpress/wp-includes/class-wp-hook.php:286 3.9385 36118072
8. FEP_Admin_Settings->fep_admin_settings() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:26 3.9387 36118072
9. FEP_Informations_Tab::section() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:92

Deprecated: Non-static method FEP_HowToConfigure_Tab::section() should not be called statically in /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php on line 93 Call Stack: 0.0000 425728
1. {main}() /wordpress/wp-admin/network/index.php:0 0.0001 426112
2. require_once('/wordpress/wp-admin/network/admin.php') /wordpress/wp-admin/network/index.php:11 0.0001 426808
3. require_once('/wordpress/wp-admin/admin.php') /wordpress/wp-admin/network/admin.php:13 3.4739 34713008
4. do_action() /wordpress/wp-admin/admin.php:169 3.4739 34713384
5. WP_Hook->do_action() /wordpress/wp-includes/plugin.php:465 3.4739 34713384
6. WP_Hook->apply_filters() /wordpress/wp-includes/class-wp-hook.php:310 3.9381 36115816
7. FEP_Admin_Settings->admin_init() /wordpress/wp-includes/class-wp-hook.php:286 3.9385 36118072
8. FEP_Admin_Settings->fep_admin_settings() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:26 Notice:

Undefined variable: html_fep_how_to_configure in /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings/tabs/how-to-configure.php on line 23 Call Stack: 0.0000 425728
1. {main}() /wordpress/wp-admin/network/index.php:0 0.0001 426112
2. require_once('/wordpress/wp-admin/network/admin.php') /wordpress/wp-admin/network/index.php:11 0.0001 426808
3. require_once('/wordpress/wp-admin/admin.php') /wordpress/wp-admin/network/admin.php:13 3.4739 34713008
4. do_action() /wordpress/wp-admin/admin.php:169 3.4739 34713384
5. WP_Hook->do_action() /wordpress/wp-includes/plugin.php:465 3.4739 34713384
6. WP_Hook->apply_filters() /wordpress/wp-includes/class-wp-hook.php:310 3.9381 36115816
7. FEP_Admin_Settings->admin_init() /wordpress/wp-includes/class-wp-hook.php:286 3.9385 36118072
8. FEP_Admin_Settings->fep_admin_settings() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:26 3.9394 36119968
9. FEP_HowToConfigure_Tab::section() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:93

Deprecated: Non-static method FEP_Divers_Tab::section() should not be called statically in /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php on line 94 Call Stack: 0.0000 425728
1. {main}() /wordpress/wp-admin/network/index.php:0 0.0001 426112
2. require_once('/wordpress/wp-admin/network/admin.php') /wordpress/wp-admin/network/index.php:11 0.0001 426808
3. require_once('/wordpress/wp-admin/admin.php') /wordpress/wp-admin/network/admin.php:13 3.4739 34713008
4. do_action() /wordpress/wp-admin/admin.php:169 3.4739 34713384
5. WP_Hook->do_action() /wordpress/wp-includes/plugin.php:465 3.4739 34713384
6. WP_Hook->apply_filters() /wordpress/wp-includes/class-wp-hook.php:310 3.9381 36115816
7. FEP_Admin_Settings->admin_init() /wordpress/wp-includes/class-wp-hook.php:286 3.9385 36118072
8. FEP_Admin_Settings->fep_admin_settings() /wordpress/wp-content/plugins/flexible-elementor-panel/admin/settings.php:26 

The solution:

https://www.directupload.net/file/d/5517/gdq2v6mg_png.htm

Please fix it. Thank you.