concrete5 Environment Information
# concrete5 Version
5.6.3.1
# concrete5 Packages
Hi_Vis (1.0.8).
# concrete5 Overrides
languages/ar, languages/he_IL, languages/zh_CN, languages/da_DK, languages/nl_NL, languages/de_DE, languages/sk_SK, languages/el_GR, languages/ro_RO, languages/ja_JP, languages/tr_TR, languages/it_IT, languages/ru_RU, languages/nb_NO, languages/cs_CZ, languages/sl_SI, languages/fi_FI, languages/fa_IR, languages/sv_SE, languages/es_MX, languages/es_PE, languages/zh_TW, languages/es_AR, languages/pt_PT, languages/es_ES, languages/vi_VN, languages/fr_FR
# concrete5 Cache Settings
Block Cache - Off
Overrides Cache - Off
Full Page Caching - Off
# Server Software
Apache
# Server API
cgi-fcgi
# PHP Version
5.5.32
# PHP Extensions
bcmath, bz2, calendar, cgi-fcgi, Core, ctype, curl, date, dom, ereg, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, imap, intl, ionCube Loader, json, libxml, mbstring, mcrypt, mhash, mysql, mysqli, openssl, pcntl, pcre, PDO, pdo_mysql, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, readline, Reflection, session, shmop, SimpleXML, soap, sockets, SPL, sqlite3, standard, tidy, tokenizer, xml, xmlreader, xmlrpc, xmlwriter, xsl, Zend Guard Loader, Zend OPcache, zip, zlib.
# PHP Settings
max_execution_time - 300
log_errors_max_len - 1024
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - -1
max_input_vars - 10000
memory_limit - 256M
post_max_size - 128M
sql.safe_mode - Off
upload_max_filesize - 128M
mysql.max_links - Unlimited
mysql.max_persistent - Unlimited
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
pgsql.max_links - Unlimited
pgsql.max_persistent - Unlimited
session.cache_limiter - nocache
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5
opcache.max_accelerated_files - 2000
opcache.max_file_size - 0
opcache.max_wasted_percentage - 5
zend_optimizerplus.max_accelerated_files - 2000
zend_optimizerplus.max_file_size - 0
zend_optimizerplus.max_wasted_percentage - 5
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I'm afraid as Concrete.org states, there is no direct upgrade path from 5.6 to 5.7 regardless of what theme you use.
What that means is you can't just upgrade the CMS, you need to start with a fresh install of 5.7 which means building your pages again.
There are some migration tools by third parties in the works but I'm not how mature or reliable they are:https://www.youtube.com/watch?v=h9lzs2C88-s...