Yes, I get this error as soon as I launch the application:
Sandbox: iCash SE(5097) deny file-write-data /Users/maxprog/Dropbox/Developments/_projects/icash/dev/Builds - iCash v7.6.4 64-bit.xojo_binary_project/OS X 64 bit/iCash
http://SE.app/Contents/vcomponents_x64/vresources/en/kernel_errors.xml
Violation: deny file-write-data /Users/maxprog/Dropbox/Developments/_projects/icash/dev/Builds - iCash v7.6.4 64-bit.xojo_binary_project/OS X 64 bit/iCash
http://SE.app/Contents/vcomponents_x64/vresources/en/kernel_errors.xml
MetaData: {"build":"Mac OS X 10.13.3 (17D102)","action":"deny","target":["Users","maxprog","Dropbox","Developments","_projects","icash","dev","Builds - iCash v7.6.4 64-bit.xojo_binary_project","OS X 64 bit","iCash SE.app","Contents","vcomponents_x64","vresources","en","kernel_errors.xml"],"hardware":"Mac","platform_binary":"no","profile":"unknown","process":"iCash SE","op":"file-write-data"}
Process: iCash SE [5097]
Path: /Users/maxprog/Dropbox/Developments/_projects/icash/dev/Builds - iCash v7.6.4 64-bit.xojo_binary_project/OS X 64 bit/iCash
http://SE.app/Contents/MacOS/iCash SE
Load Address: 0x10a572000
Identifier: com.maxprog.app.icash
Version: 7.6.4 (7.6.4)
Code Type: x86_64 (Native)
Parent Process: launchd [1]
Responsible: /Users/maxprog/Dropbox/Developments/_projects/icash/dev/Builds - iCash v7.6.4 64-bit.xojo_binary_project/OS X 64 bit/iCash
http://SE.app/Contents/MacOS/iCash SE [5097]
User ID: 501
Date/Time: 2018-03-29 11:33:08.385 GMT+2
OS Version: Mac OS X 10.13.3 (17D102)
Report Version: 8
Thread 0 (id: 46649842):
0 libsystem_kernel.dylib 0x00007fff6bfffb3a __open + 10
1 CarbonCore 0x00007fff45352647 FSMount::_openfork(char const*, unsigned char, unsigned int, unsigned short, _filesec*, int*, int*, FSOpenForkInfo*) + 643
2 CarbonCore 0x00007fff45351f3b FSMount:
penforkcoreDefault(unsigned int, unsigned int, unsigned int, char const*, char const*, unsigned int, unsigned char, unsigned char, FSOpenForkInfo*, unsigned short, _filesec*, unsigned int, int*, unsigned int*, unsigned int*) + 939
3 CarbonCore 0x00007fff453515e2 PBOpenForkSync + 506
4 CarbonCore 0x00007fff453513d5 FSOpenFork + 47
5 libvshared_fat_release_x64.dylib 0x00000001103218ba fbl::File_Mac:
oOpen() + 234
6 libvshared_fat_release_x64.dylib 0x0000000110320f36 fbl::File::Open() + 36
7 libvkernel_fat_release_x64.dylib 0x0000000111a762c4 fbl::LoadErrorResourceFile(fbl::String const&, fbl::ErrorEntry* (*)(unsigned int), unsigned int) + 213
8 libvkernel_fat_release_x64.dylib 0x0000000111a7601a fbl::LoadErrorResource(unsigned short const*, unsigned int) + 137
9 libvkernel_fat_release_x64.dylib 0x0000000111b5ef86 fbl::ValentinaInit_imp(unsigned int, char const*, char const*, char const*) + 66
10 libvkernel_fat_release_x64.dylib 0x0000000111b5eed4 fbl::ValentinaInit(unsigned int, char const*, char const*, char const*) + 20
11 v4rb_cocoa_64.dylib 0x0000000110234d89 Valentina_Init(int, REALstringStruct*, REALstringStruct*, REALstringStruct*) + 35
12 iCash SE 0x000000010a735ce5 Valentina.Init%%i8sss + 85