Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires enshrined/svg-sanitize ^0.16.0, found enshrined/svg-sanitize[0.16.0] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-4g5g-4rkv-myqs") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 2 - Root composer.json requires firebase/php-jwt ~5.0, found firebase/php-jwt[v5.0.0, ..., v5.5.1] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-2kqm-ps5x-s4f5") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 3 - Root composer.json requires phpoffice/phpexcel ~1.8, found phpoffice/phpexcel[1.8.0, 1.8.1, 1.8.2] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-kxx5-ph1r-5bg2", "PKSA-bx2k-kfb8-w1zm", "PKSA-j2jw-2hjb-39hn", "PKSA-2vt6-y6jz-crs9", "PKSA-j343-tkpg-k39h", "PKSA-1p4c-ysfb-v9ph", "PKSA-81dj-mb26-861s", "PKSA-gn6r-3fbg-vpq7", "PKSA-b7bk-6mnf-vvf4", "PKSA-xzzd-fyzv-1nm2", "PKSA-yb2q-9cbc-scfr", "PKSA-n1xd-9q81-6m2k", "PKSA-5bk7-32wt-w1f6", "PKSA-wd5y-fztj-66t8", "PKSA-996h-kvqc-cdky", "PKSA-p4bt-rmgm-ynz5", "PKSA-79jx-g5m1-5ybs", "PKSA-hn36-2kk8-hb3y", "PKSA-s9h9-dzpw-9hsj", "PKSA-xj88-cdcs-bgkr") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 4 - Root composer.json requires symfony/http-foundation ~2.8|~3.0, found symfony/http-foundation[v2.8.0, ..., v2.8.52, v3.0.0, ..., v3.4.47] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-365x-2zjk-pt47", "PKSA-b35n-565h-rs4q") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 5 - Root composer.json requires symfony/validator ~3.0|~4.0, found symfony/validator[v3.0.0, ..., v3.4.47, v4.0.0, ..., v4.4.48] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-w2tw-kmfg-rt9s") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 6 - Root composer.json requires twig/twig 1.*, found twig/twig[1.3.0, ..., v1.44.8] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-yhcn-xrg3-68b1", "PKSA-2wrf-1xmk-1pky") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 7 - Root composer.json requires packbackbooks/lti-1p3-tool 1.1.1.x-dev -> satisfiable by packbackbooks/lti-1p3-tool[1.1.1.x-dev]. - packbackbooks/lti-1p3-tool 1.1.1.x-dev requires firebase/php-jwt ^5.2 -> found firebase/php-jwt[v5.2.0, ..., v5.5.1] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-2kqm-ps5x-s4f5") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. Problem 8 - Root composer.json requires media-alchemyst/media-alchemyst ~0.5 -> satisfiable by media-alchemyst/media-alchemyst[0.5.0, ..., 0.5.7]. - media-alchemyst/media-alchemyst[0.5.0, ..., 0.5.5] require symfony/process ^2.1.1|^3.0 -> found symfony/process[v2.1.1, ..., v2.8.52, v3.0.0, ..., v3.4.47] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-wws7-mr54-jsny") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config. - media-alchemyst/media-alchemyst 0.5.6 requires php-ffmpeg/php-ffmpeg ^v0.15 -> found php-ffmpeg/php-ffmpeg[v0.15] but it conflicts with your root compos