I'm a different user, it's happening for me as well but in chrome (windows desktop) (giving a different message though, "null function or function signature mismatch" instead)
Console errors:
ERROR: Condition "(type & 0xFF) >= Variant::VARIANT_MAX" is true. Returned: ERR_INVALID_DATA
onPrintError @ index.js:362
at: decode_variant (core/io/marshalls.cpp:111) - Condition "(type & 0xFF) >= Variant::VARIANT_MAX" is true. Returned: ERR_INVALID_DATA
onPrintError @ index.js:362
ERROR: Error when trying to encode Variant.
onPrintError @ index.js:362
at: get_var (core/bind/core_bind.cpp:2214) - Condition "err != OK" is true. Returned: Variant()
onPrintError @ index.js:362
exception thrown: RuntimeError: null function or function signature mismatch,RuntimeError: null function or function signature mismatch
at wasm://wasm/032ee88e:wasm-function[7152]:0x1e9f15
at wasm://wasm/032ee88e:wasm-function[2566]:0xa3884
at wasm://wasm/032ee88e:wasm-function[21635]:0x6dc53b
at wasm://wasm/032ee88e:wasm-function[7123]:0x1e92dd
at wasm://wasm/032ee88e:wasm-function[7152]:0x1e9de3
at wasm://wasm/032ee88e:wasm-function[2566]:0xa389a
at wasm://wasm/032ee88e:wasm-function[11003]:0x33cbd2
at wasm://wasm/032ee88e:wasm-function[21633]:0x6dc486
at wasm://wasm/032ee88e:wasm-function[13153]:0x3d46d5
at wasm://wasm/032ee88e:wasm-function[1444]:0x5f16a
onPrintError @ index.js:362
null function or function signature mismatch
displayFailureNotice @ index.html:215
