Kmymoney is normaly open..
kmymoney
WebConnect: Starting server failed. Try to remove stale socket.
WebConnect: Running in server mode
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile

some color defects but it does not matter
if i'm importing a ofx file :

LibOFX INFO: libofx_proc_file(): File format not specified, autodetecting...
(Above message occured on Line 18446744073709551615, Column 18446744073709551615)
LibOFX INFO: libofx_proc_file(): Detected file format: OFX (Open Financial eXchange (OFX or QFX))
(Above message occured on Line 18446744073709551615, Column 18446744073709551615)
/usr/include/c++/8/bits/basic_string.h:1048: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator[](std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference = char&; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]: Assertion '__pos <= size()' failed.
Aborted (core dumped)

it's systematic


SOFTWARE VERSIONS 5.00
(available in About System)
Kernel: 4.18.10-200.fc28.x86_64 x86_64 bits: 64 Desktop: KDE Plasma 5.13.4