My local XF installation (currently at 2.3) is showing the following error on every page. This problem also existed before 2.3 but would randomly disappear and then return. I've tried rebuilding master data, recompiling, and disabling add-ons, but nothing I've done seems to have helped. Does anyone have any idea what might be wrong with my installation? It’s frustrating that I get this error on every page.

Code:
'Errors occurred when rendering CSS:\A * public:lightbox.less: ParseError: Unexpected input in public:lightbox.less on line 41, column 45 (on or near line 41)\A 38 | @faWeight-regular: 400;\A 39 | @faWeight-solid: 900;\A 40 | \A *41*| url(/styles/fa/regular/glass.svg?v=5.15.3): url(/styles/fa/regular/glass-martini.svg?v=5.15.3);\A 42 | url(/styles/fa/regular/star-o.svg?v=5.15.3): url(/styles/fa/regular/star.svg?v=5.15.3);\A 43 | url(/styles/fa/regular/remove.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A 44 | url(/styles/fa/regular/close.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A \A * public:node_list.less: ParseError: Unexpected input in public:node_list.less on line 41, column 45 (on or near line 41)\A 38 | @faWeight-regular: 400;\A 39 | @faWeight-solid: 900;\A 40 | \A *41*| url(/styles/fa/regular/glass.svg?v=5.15.3): url(/styles/fa/regular/glass-martini.svg?v=5.15.3);\A 42 | url(/styles/fa/regular/star-o.svg?v=5.15.3): url(/styles/fa/regular/star.svg?v=5.15.3);\A 43 | url(/styles/fa/regular/remove.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A 44 | url(/styles/fa/regular/close.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A \A * public:rating_stars.less: ParseError: Unexpected input in public:rating_stars.less on line 41, column 45 (on or near line 41)\A 38 | @faWeight-regular: 400;\A 39 | @faWeight-solid: 900;\A 40 | \A *41*| url(/styles/fa/regular/glass.svg?v=5.15.3): url(/styles/fa/regular/glass-martini.svg?v=5.15.3);\A 42 | url(/styles/fa/regular/star-o.svg?v=5.15.3): url(/styles/fa/regular/star.svg?v=5.15.3);\A 43 | url(/styles/fa/regular/remove.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A 44 | url(/styles/fa/regular/close.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A \A * public:share_controls.less: ParseError: Unexpected input in public:share_controls.less on line 41, column 45 (on or near line 41)\A 38 | @faWeight-regular: 400;\A 39 | @faWeight-solid: 900;\A 40 | \A *41*| url(/styles/fa/regular/glass.svg?v=5.15.3): url(/styles/fa/regular/glass-martini.svg?v=5.15.3);\A 42 | url(/styles/fa/regular/star-o.svg?v=5.15.3): url(/styles/fa/regular/star.svg?v=5.15.3);\A 43 | url(/styles/fa/regular/remove.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A 44 | url(/styles/fa/regular/close.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A \A * public:structured_list.less: ParseError: Unexpected input in public:structured_list.less on line 41, column 45 (on or near line 41)\A 38 | @faWeight-regular: 400;\A 39 | @faWeight-solid: 900;\A 40 | \A *41*| url(/styles/fa/regular/glass.svg?v=5.15.3): url(/styles/fa/regular/glass-martini.svg?v=5.15.3);\A 42 | url(/styles/fa/regular/star-o.svg?v=5.15.3): url(/styles/fa/regular/star.svg?v=5.15.3);\A 43 | url(/styles/fa/regular/remove.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A 44 | url(/styles/fa/regular/close.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A \A * public:extra.less: ParseError: Unexpected input in public:extra.less on line 41, column 45 (on or near line 41)\A 38 | @faWeight-regular: 400;\A 39 | @faWeight-solid: 900;\A 40 | \A *41*| url(/styles/fa/regular/glass.svg?v=5.15.3): url(/styles/fa/regular/glass-martini.svg?v=5.15.3);\A 42 | url(/styles/fa/regular/star-o.svg?v=5.15.3): url(/styles/fa/regular/star.svg?v=5.15.3);\A 43 | url(/styles/fa/regular/remove.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);\A 44 | url(/styles/fa/regular/close.svg?v=5.15.3): url(/styles/fa/regular/times.svg?v=5.15.3);'
