Fatal error: Uncaught InvalidArgumentException: Passed value cannot be an array in /home/storage/b/a0/aa/revistasdwwe1/public_html/lib/pkp/lib/vendor/danielstjules/stringy/src/Stringy.php:45 Stack trace: #0 /home/storage/b/a0/aa/revistasdwwe1/public_html/lib/pkp/lib/vendor/danielstjules/stringy/src/Stringy.php(73): Stringy\Stringy->__construct(Array, NULL) #1 /home/storage/b/a0/aa/revistasdwwe1/public_html/lib/pkp/classes/core/PKPString.inc.php(160): Stringy\Stringy::create(Array) #2 /home/storage/b/a0/aa/revistasdwwe1/public_html/cache/t_compile/a95e9f20492587d73a4f35fa465ca6ee809b9709^c2055d14f27582f3361894f4184ce1a4c0497385_0.app.frontendpagessearchAuthor.php(58): PKPString::substr(Array, 0, 1) #3 /home/storage/b/a0/aa/revistasdwwe1/public_html/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_66f73260022b30_92146811(Object(Smarty_Internal_Template)) #4 /home/storage/b/a0/aa/revistasdwwe1/public_html/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled in /home/storage/b/a0/aa/revistasdwwe1/public_html/lib/pkp/lib/vendor/danielstjules/stringy/src/Stringy.php on line 45