I cannot access my wp admin anymore, am getting the below error
Fatal error: Cannot redeclare tgmpa() (previously declared in /home/content/n3pnexwpnas02_data02/74/3402574/html/wp-content/plugins/our-team-enhanced/admin/class/class-tgm-plugin-activation.php:1927) in /home/content/n3pnexwpnas02_data02/74/3402574/html/wp-content/themes/bluestreet/class-tgm-plugin-activation.php on line 1927
Did this error occur after installing/updating your theme or plugins? If you are on managed wp hosting, I would use a restore of the last previous working version of the site. The Restore function is available under the Options Dialogues in your WP panel. If you are on cPanel, did you set autobackup to on when you installed wp? If so, same suggestion as above.
Next, if this occurred during an update/upgrade make sure you have allocated enough server resources to run your installation. You can up both the memory and the php execution limits. Often this prevents these types of error when upgrading.